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San Leandro city workers chop up a large fallen branch in the front yard of a home on the 900 block of Joaquin Avenue in San Leandro, Calif., on Monday, April 8, 2013.(Laura A. Oda/Staff)

Powerful winds swept across the Bay Area on Monday morning, toppling trees and power lines, causing power outages for thousands and prompting the National Weather Service to issue a hazardous weather advisory for the region.

Wind gusts as strong as 75 mph were reported in San Francisco, according to Christine Riley, a forecaster with the National Weather Service. The powerful winds hit San Francisco between 11 p.m. Sunday and 1 a.m. Monday and moved steadily south, Riley said.

San Francisco International Airport reported a wind gust of 60 mph at 2 a.m., Riley said. Several other locations throughout the Bay Area reported winds of up to 40 mph; most of the top gusts were recorded between 1 and 4 a.m.

At 3:37 a.m., Mineta San Jose International Airport reported a gust of 44 mph, according to the weather service.

Strong winds made it difficult to extinguish a Sunnyvale fire that destroyed two detached garages and damaged a duplex on Angel Avenue, according to the Sunnyvale Department of Public Safety. The two-alarm fire was reported at 3:40 a.m. and quickly jumped from one detached garage to a neighboring garage and duplex.

The wind also knocked down trees and power lines throughout the Bay Area, at one point leaving about 14,000 customers without power, according to PG&E.

In addition, the wind was responsible for at least one car getting smashed. A vehicle in the 400 block of Ridgeview Drive in Pleasant Hill was heavily damaged by a falling tree about 2 a.m., police said.

In unincorporated San Mateo County, all lanes of Highway 84 were closed at 5:15 a.m. because of fallen power lines on the roadway, according to the California Highway Patrol.

The strong winds were a result of a mild storm system that moved through the Bay Area overnight, dropping as much as three-tenths of an inch of rain, Riley said. As the storm system moved south and east, high pressure began to build, causing the strong winds.

A warming trend is expected to hit the Bay Area on Wednesday; temperatures about 5 to 10 degrees above normal are expected, Riley said. Temperatures on Wednesday are expected to hit 83 degrees in San Jose, 78 in Oakland and 80 in Palo Alto.

Contact Mark Gomez at 408-920-5869. Follow him at Twitter@MarkMgomez.